Adjustable triangle



FIG. 1 is a perspective view of the adjustable triangle.

FIG. 2 is a front view thereof.

FIG. 3 is a back view thereof.

FIG. 4 is a bottom view thereof.

FIG. 5 is a top view thereof.

FIG. 6 is a side view thereof; and,

FIG. 7 is another side view thereof. 

CLAIM The ornamental design for an adjustable triangle, as shown and described. 